Multi-color　laser　diode　array　end-pumped　Nd:YAG　electro-optical　Q-switched　laser　without　temperature　controlled　was　developed.　Using　a　4　000　W　multi-color　QCW　laser　diode　array　as　the　pumping　source,　and　fast　axis　collimator,　lens　duct　as　coupling　system,　and　RTP　as　Q-switch,　end-pumped　φ6　mm×60　mm　Nd:YAG　crystal,　the　laser　obtained　a　1　064　nm　pulsed　laser　output　with　maximum　output　energy　of　74.4　mJ,　pulse　width　of　15　ns　and　optical　conversion　efficiency　of　11%　at　the　repetition　rate　of　5　Hz　and　25.　The　spectral　characteristics　of　multi-wavelength　LDA　and　the　output　characteristics　of　the　laser　were　tested　under　operating　temperature　of　25　to　55,　the　output　energy　of　the　laser　rapidly　decreases,　then　gradually　stabilizes　with　the　increase　of　the　working　temperature.　When　the　repetition　rates　are　5　Hz　and　10　Hz,　the　minimum　output　energy　of　the　laser　is　48　mJ　and　37　mJ,　respectively.　Experiments　indicate　that　the　multi-color　laser　diode　array　has　more　value　in　realizing　no　temperature　control　of　high　energy　all-solid-state　lasers.　©　2018,　Science　Press.　All　right　reserved.