A tent having telescopic leg tubes and convenient locking mechanisms, comprising a tent top frame (1) and supporting legs (2). The supporting legs (2) comprise fixed leg tubes (201), movable leg tubes (202), and the locking mechanisms limiting movement of the movable leg tubes (202); the locking mechanisms comprise locking pressing plates (204) which are movably provided on the fixed leg tubes (201) and can move back and forth with respect to the movable leg tubes (202), and locking parts (206) which can be linked with the locking pressing plates (204) to lock the movable leg tubes (202). The locking pressing plates and the locking parts of the locking mechanisms are matched coaxially, and locking or unlocking can be realized by simply rotating the locking pressing plates; the structure is simple, the connection reliability is high, and the operation is convenient.