from pptx import Presentation
from pptx.enum.text import PP_ALIGN

prs = Presentation('originalppt.pptx') #导入ppt

sthead=prs.slides[2].shapes[1] #以第3张ppt为标准标题格式
print(sthead.text)
stleft=sthead.left
stwidth=sthead.width
sttop=sthead.top
stheight=sthead.height

#进行逐个修改
i=1
for slide in prs.slides:
 for shape in slide.shapes:
 if shape.has_text_frame:
  if 36000<shape.left<1200000 and shape.height<1400000:
   ftname=(shape.text_frame.paragraphs[0].runs[0].font.name)
   ftsize=int(shape.text_frame.paragraphs[0].runs[0].font.size.pt)
   if (ftsize>27):
   head=shape
   head.left=stleft
   head.top=sttop
   head.width=10080000
   head.height=stheight
   
   head.text_frame.vertical_anchor = MSO_ANCHOR.MIDDLE
   head.text_frame.paragraphs[0].line_spacing=1

   for paragraph in head.text_frame.paragraphs:
    for run in paragraph.runs:
    run.font.size = 32*12700 
    run.font.name = '宋体'

   #print(i,'ok')

 i +=1

prs.save('adjnew.pptx') #保存修改后的ppt