您可以使用locator来指示在何处放置刻度，例如100的倍数。使用formatter来指示如何显示值：

import matplotlib.pyplot as plt
from matplotlib.ticker import MultipleLocator

fig, ax = plt.subplots(figsize=(15, 2))
ax.plot([13100, 22000], [1, 1])
ax.xaxis.set_major_locator(MultipleLocator(100))
ax.xaxis.set_major_formatter(lambda x, pos: f'1:{x / 1000:.1f}')
ax.tick_params(axis='x', rotation=90) # optionally rotate the ticks
plt.tight_layout()
plt.show()

您还可以合并次要刻度和主要刻度。以下是一个示例：

import matplotlib.pyplot as plt
from matplotlib.ticker import MultipleLocator

fig, ax = plt.subplots(figsize=(15, 2))
ax.plot([13100, 22000], [1, 1])
ax.xaxis.set_major_locator(MultipleLocator(1000))
ax.xaxis.set_major_formatter(lambda x, pos: f'1:{x / 1000:.0f}')
ax.xaxis.set_minor_locator(MultipleLocator(100))
ax.xaxis.set_minor_formatter(lambda x, pos: f'.{(x / 100) % 10:.0f}')

ax.tick_params(axis='x', which='major', labelsize=12, length=12)
ax.tick_params(axis='x', which='minor', labelsize=9)
plt.tight_layout()
plt.show()