1.启动Excel，打开相应的工作表。
2.执行“工具→宏→Visual Basic编辑器”命令（或者直接按“Alt+F11”组合键），进入Visual Basic编辑状态。
3.执行“插入→模块”命令，插入一个新模块。再双击插入的模块，进入模块代码编辑状态。
4.将代码输入其中。代码如下：
Function getpychar(char)
tmp = 65536 + Asc(char)
If (tmp >= 45217 And tmp <= 45252) Then
getpychar = "A"
ElseIf (tmp >= 45253 And tmp <= 45760) Then
getpychar = "B"
ElseIf (tmp >= 45761 And tmp <= 46317) Then
getpychar = "C"
ElseIf (tmp >= 46318 And tmp <= 46825) Then
getpychar = "D"
ElseIf (tmp >= 46826 And tmp <= 47009) Then
getpychar = "E"
ElseIf (tmp >= 47010 And tmp <= 47296) Then
getpychar = "F"
ElseIf (tmp >= 47297 And tmp <= 47613) Then
getpychar = "G"
ElseIf (tmp >= 47614 And tmp <= 48118) Then
getpychar = "H"
ElseIf (tmp >= 48119 And tmp <= 49061) Then
getpychar = "J"
ElseIf (tmp >= 49062 And tmp <= 49323) Then
getpychar = "K"
ElseIf (tmp >= 49324 And tmp <= 49895) Then
getpychar = "L"
ElseIf (tmp >= 49896 And tmp <= 50370) Then
getpychar = "M"
ElseIf (tmp >= 50371 And tmp <= 50613) Then
getpychar = "N"
ElseIf (tmp >= 50614 And tmp <= 50621) Then
getpychar = "O"
ElseIf (tmp >= 50622 And tmp <= 50905) Then
getpychar = "P"
ElseIf (tmp >= 50906 And tmp <= 51386) Then
getpychar = "Q"
ElseIf (tmp >= 51387 And tmp <= 51445) Then
getpychar = "R"
ElseIf (tmp >= 51446 And tmp <= 52217) Then
getpychar = "S"
ElseIf (tmp >= 52218 And tmp <= 52697) Then
getpychar = "T"
ElseIf (tmp >= 52698 And tmp <= 52979) Then
getpychar = "W"
ElseIf (tmp >= 52980 And tmp <= 53640) Then
getpychar = "X"
ElseIf (tmp >= 53679 And tmp <= 54480) Then
getpychar = "Y"
ElseIf (tmp >= 54481 And tmp <= 62289) Then
getpychar = "Z"
Else '如果不是中文，则不处理
getpychar = char
End If
End Function
'逐个取ASC码
Function getpy(str)
For i = 1 To Len(str)
getpy = getpy & getpychar(Mid(str, i, 1))
Next i
End Function
5.代码输入完成后，关闭Visual Basic编辑窗口，返回Excel编辑状态。
6.自定义函数就可以用了。如：选中A2单元格，输入公式：=getpy(A2)。
