A pair of tree shears capable of reducing the opening degree of its two handles. The first handle (2) is connected with a first blade (11), the second handle (3) has front (31) rear (32) sections sleeved with each other, and the front section (31) is connected with the second blade (12). A link rod (4) has an end pivoted with the first handle and another end pivoted with the rear section of the second handle (3). While the two handles are opened, the link rod affects the front section of the second handle to move relative to the rear section of the second handle (3), so as to adjust a length of the second handle to reduce the opening degree of the handles. The first handle may also have a front (22) and rear (23) section which move relative to each other due to a second link rod (82).
