matplotlib绘制图像设置中文宋体，英文新罗马，字体大小7.5，坐标轴刻度线内侧

import matplotlib
import numpy as np
import matplotlib.pyplot as plt
from matplotlib import rcParams
matplotlib.use("pgf")
pgf_config = {
    "font.family": 'serif',
    "font.size": 7.5,  #字体大小7.5
    "pgf.rcfonts": False,
    "text.usetex": True,
    "pgf.preamble": [
        r"\usepackage{unicode-math}",
        r"\setmainfont{Times New Roman}",
        r"\usepackage{xeCJK}",
        r"\setCJKmainfont{SimSun}",
    ],
}
rcParams.update(pgf_config)
plt.rcParams['xtick.direction'] = 'in'
plt.rcParams['ytick.direction'] = 'in'#刻度内测，out外侧


x = [1,2,3,4,5]
y_y=[0.5,0.6,0.7,0.8,0.9]#原始图片
#plt.rcParams['font.sans-serif'] = ['Microsoft YaHei']
#plt.rcParams['axes.unicode_minus'] = False
#plt.figure(50)
for i in range(len(y_y)):
    plt.text(x[i], y_y[i]+0.01, '%.3f' %(y_y[i]),ha='center')
plt.plot(x, y_y,'rp--')#,label='Integrated algorithm'
#plt.plot(x, y_1,'bp--',label='01')
#plt.plot(x, y_2,'rp--',label='03')
#plt.plot(x, y_200,'gp-',label='data=200')
# set x limits
plt.xlim((0.8, 5.2))
plt.ylim((0.8, 1))
plt.xticks(x)
#plt.xlabel('Number of data preprocessing',fontsize=13)#########x轴代表
plt.xlabel('横纵')
plt.ylabel('纵轴')############y轴代表
plt.title('标题')###########title 14
#plt.legend(loc='upper left',fontsize=13)
#plt.show()
plt.savefig('./集成2.png', dpi=800)

第一次运行需要安装插件，需要等待一会，安装完毕重新运行等待运行结束，查看保存图片的路径即可