High-strength plug-in type tree grate convenient to maintain

The utility model provides a high-strength plug-in type tree grate convenient to maintain, which relates to the field of greening maintenance and comprises a square grate, a circular grate is movably connected to the middle of the square grate, a small through hole is formed in the top of the circular grate, a square through hole is formed in the top of the square grate, and the small through hole is communicated with the square through hole. Nut heads are movably connected to the two sides of the top of the square grate, presser foot rings are movably connected to the positions, located on the top of the square grate, of the bottoms of the nut heads, internal threads are arranged in a first sliding block and a second sliding block, and under the influence of the threads, a connecting shaft rotates to drive the first sliding block and the second sliding block to move linearly. The connecting shaft can drive the first sliding block and the second sliding block to contract inwards, otherwise, the first sliding